Thank you for the photos!
The hilt can be either jade (nephrite or jadeite) or onyx. Cannot say.
From the photo with the text (the one from the link you provided), one can clearly see that it is not antique wootz.
So it is either some faux-wootz (done by pattern etching) or some modern version of "wootz."
The koftgari also looks very fresh...
It would be interesting to hear what others have to say about this.
